Periscope has officially unveiled sketching. A new feature, which, lets you draw over your stream.

The feature comes in handy when you have something to illustrate.

However, when you do a sketch it vanishes after a few seconds, meaning those who tune in to the stream later may not be able to see it.

The video streaming app is also launching a new statistics feature that shows you how many total views your broadcast had, as well as information on when people tuned in.